свойство sourceCapabilities
переопределение
Реализация
InputDeviceCapabilities? get sourceCapabilities =>
JS('InputDeviceCapabilities', '#.sourceCapabilities', this);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.19.6/dart-html/KeyEvent/sourceCapabilities.html
